Calls are failing in IVR intermittently – Some calls go through successfully and some fail intermittently and it may seem like the TCP connection is broken from the VRU PIM side at the time of the failed calls.

DNS Not configured. Gateway : 10.78.91.1 on Ethernet 0
If the Duplicate IP field is set to Yes as above, check if there are 2 servers that are connected to the same switch and using the same IP. Correct this and retry calls.
You may have to collect TCP packets to get more insight into the duplicate IPs being used. Use the following CLI command to capture the IP packets for a particular ethernet interface :

utils network capture eth0

Also, Tcp dump will have a message indicating that a duplicate IP is being used.

Recommended Action

Remove the duplicate IP that is being used for IVR and reboot the system.